Is it just marketing or is there an actual structural difference?
In: 807
I design a lot of aluminum parts. Strength is the key difference between grades. There can be more than a three fold difference between the yield strength of the better grades (6061, 2024 and 7075) and the basic aluminum you’ll get it your spec isn’t specific. They all have similar density and stiffness. Of my favorite grades 7075 is the strongest but 2024 is a bit tougher which is really important if fatigue is a concern. Even among identical grades the source matters. I find Alcoa is very consistent from batch to batch.
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